I am writing a simple jQuery page with two images shown. Clicking on one of them triggers a CSS3 transformation, which should end zooming on the image.
The page has to be viewed on iPad, thus I must use CSS3 3D Transformation in order to use the hardware acceleration and keep the transition smooth.
I wrote a simple demo script here: http://jsfiddle.net/andrearota/KAdmV/4/
E.g. here is how I zoom in, using scale factor. Please note that I use the z property trying to get the div over the closed one:
Carousel.prototype.openLeft = function (callback) {
var that = this;
if (this.leftStatus != 'open') {
this.left.transition({
z: '+=100',
scale: 2
}, function () {
that.leftStatus = 'open';
if (callback) callback();
});
} else {
if (callback) callback();
}
};
As you can see, if you clic on the left image, the image is zoomed in and goes over the right one. When you click on the right one, vice versa. But then, if you click again on the left one, you can see an issue on image stacking as the left zoomed image goes under the minimized right one.
Any hint?
It looks like you can remove the transform on the second image and it will go back behind the first one. So in other words, on image click I would probably first remove all occurrences of the transform property before applying to the clicked image.
Or you could also set both images to position:relative and then on click set the z-index to something like 5 and set all other images to something below it such as 3. But again, you'll need to clear these inline styles so that when another image is clicked there are remnants from before that give you un-clear results.
Related
Can anyone explain why the click handler is not invoked consistently in this example?
http://jsfiddle.net/4QBnf/
For instance, if you click in the upper left half of the div, it does not reliably increment the counter.
If I remove the padding-top from this block it works just fine:
.click-check:active {
background-color:blue;
padding-top: 25px;
}
I have tested this in a number of different browsers and it behaves the same way.
I found two possible issues with your code. You can view the fixes here:
http://jsfiddle.net/4QBnf/6/
CSS Box Model vs jQuery Box Model
Whenever you click on the top half of your box, you aren't technically clicking on .click-check, you are actually clicking on .count. This image shows the location of .count relative to .click-check:
jQuery counts this as a click on .click-check, but CSS doesn't. The number increments, but the CSS "active" effect isn't applied.
You can resolve this by removing the .count div and placing everything inside of .click-check.
jQuery Counter
The second issue is with your jQuery code. The code currrently reads:
$('.click-check').click(function() { $('.count').html(count++); });
count isn't increased until after this line is done. This means that the first click appears to have no effect.
This line will increment count, then display it to the user:
$('.click-check').click(function() { $('.click-check').html(++count); });
I've applied both updates to your example here:
http://jsfiddle.net/4QBnf/6/
Update
An alternate way to resolve the issue is to do everything through jQuery. This synchronizes all of the appearance and logic into a single box-model interpretation.
var count=0;
$('.click-check').mousedown(function() {
$('.click-check').addClass("active");
$('.click-check').html(++count);
setTimeout(function(){
$('.click-check').removeClass("active");
}, 50);
});
http://jsfiddle.net/4QBnf/15/
Is it possible to only trigger a div's mouseover when the cursor is over an opaque part of the div's background image? Perhaps via Javascript?
All I can find with Google are old IE PNG fixes.
This looks like a similar question to this one: Hit detection on non-transparent pixel
I suppose this could also be done for background image by getting the attribute with jQuery:
$('#myDiv').css('background-image');
I haven't personally done this, but it seems like a viable solution. This will only work for modern browsers, but you should be able to make it back-compatible with excanvas.
It is possible, just not very easily. You'll have to use a lot of Javascript.
You'd want to attach to your <div>'s onmousemove event, which returns the X,Y coordinates of the cursor. Your event handler function would then test to see if the cursor is in the correct place in order to trigger an alternative onmouseover event.
Implementing the "is the cursor over an opaque pixel or not?" test can be done two ways: the first is to create a simple mathematical expression (say if the opaque parts of the image make neat rectangles, circles or polygons). The more difficult (and less browser-supported) way is to load the background image into a Canvas object and then get the current pixel value's opacity figure and take it from there, like so:
var pixel = canvas.getImageData(x, y, 1, 1).data;
var alpha = pixel[3]; // assuming RGBA
if( alpha > threshold ) onMouseOver(); // raise the event
Another alternative is to create an entirely transparent div (or some other element) positioned and sized so that it only covers the opaque part of the div below, then just test the mouseover of that element's box.
It's a bit of tweaking but why don't you add a class to your opaque div, and use JavaScript to check for it?
In jQuery:
$('div').mouseover(function(){
if ($(this).is('.opaque')) {
//Some actions
}
});
I know how to toggle an entire div, however I only want to hide all but the top 10% or top 100px, for example. And then when the div is clicked, the entire div opens.
I thought I saw this a while ago, but can't remember where.
Thanks.
$(document).ready(function() {
// hides the slickbox as soon as the DOM is ready
$('#slickbox').hide();
// toggles the slickbox on clicking the noted link
$('#slick-toggle').click(function() {
$('#slickbox').toggle(400);
return false;
});
});
Your code should be something in the lines of:
$(document).ready(function() {
// hides the slickbox as soon as the DOM is ready
$('#slickbox').animate({height: '20px'});
// toggles the slickbox on clicking the noted link
$('#slick-toggle').click(function() {
$('#slickbox').animate({height: '100%'});
return false;
});
});
Take a look the image on my home page, is this kind of what you want to do?
http://www.carsonshold.com/
I have it jet out when you hover over it, but that can easily be changed to a click. It somewhat complicated to do, and still isn't perfect in IE (the page loads and the clip isn't recognized until you hover over it).
It may be slightly different from what you want since I did this on an image rather than a div, so I needed to animate the clipping mask. The function I used is as follows:
var featureDuration = 300; //time in miliseconds
$('#featured-img').hover(function() {
$(this).animate({ left : "-164", clip: "rect(0px,384px,292px,0px)" },{queue:false,duration:featureDuration});
}, function() {
$(this).animate({ left : "17px", clip: "rect(0px,203px,292px,0px)" },{queue:false,duration:featureDuration});
});
If you want to animate the clip, you will need to insert this JS as well because it doesn't behave properly otherwise. http://www.overset.com/2008/08/07/jquery-css-clip-animation-plugin/
Take a look at the CSS in my code if you are unsure how I did the rest of it, or comment on here if you have any questions.
Cheers
Did this rather quickly, note it will only hide the bottom portion.
http://jsfiddle.net/loktar/KEjeP/
Simple toggle that changes the height, hiding the rest of the content within. Easy enough to animate as well, just modify the toggle functions to adjust the heights rather than adding a class.
I'm using a flip mechanism to navigate through my site (flip file & demo). The problem is, once it's flipped the content been displayed good just like I want it, but there's some offset from the flipped (right) parts en the solid left part (visible when you look closely). Also the right part is now a little blurred (which is the disturbing part of my issue). This all caused by the flip (I think the rotationY is causing the problem).
When I click a button I do the following:
flip=new Flip(currentPage,nextPage,richting);
content.addChild(flip);
currentPage=nextPage;
nextPage = new MovieClip();
there is a fix for it, consider the following:
// store original matrix
var origMatrix:Matrix = box.transform.matrix;
// set initial position
box.rotationY = -180;
// start animation
TweenLite.to(box, 1, {rotationY:0, onComplete:cleanBlur})
// execute after animation complete
function cleanBlur():void {
box.transform.matrix = origMatrix;
}
maybe you can find better results using other 3d library.
EDIT: sorry the "box" object, I was testing in flash, but box would be any of your pages to flip. Just apply the same logic.
Matteo at Flash & Math has an excellent solution for this. He actually found that when you bring an object into native 3D space it expands the object by one pixel in both the width and height. This can be counteracted by scaling your object back and then setting it's z to 0 which will scale it back up. Now the object is ready to play with without the blur.
http://www.flashandmath.com/flashcs4/blursol/index.html
adding: This fixes the scale issue, but not the blurriness. You will still need to use the matrix transformation fix posted above.
I created a contentEditable div to use as a rich textarea. It has resize handlers around it that I'd like to get rid of. Any idea how I'd do this?
Edit: This appears to be happening because I am absolutely positioning the div, so Firefox adds an infuriating _moz_resize attribute to the element which I cannot turn off.
Just as a side note, you can disable Firefox's automatic resize handle feature by sending the (somewhat poorly-documented) enableObjectResizing command to the document:
document.execCommand("enableObjectResizing", false, false);
AFAIK, this can only safely be done once the document has loaded, and there's no way I know of to disable the grabber, which is a separate feature.
It looks like I'll be able to work around this by adding a wrapper div and absolutely positioning the wrapper and then making the inner div contentEditable.
In Chrome 39, these handles don't seem to exist, even if you wanted them to.
In Firefox, one can simply use execCommand, like ZoogieZork answered.
But in Internet Explorer this can't be turned off. It must be worked around.
In WYMeditor development, here's what I've found.
The following results in:
In IE, the resize UI shows up for a split second and then disappears. There seems to be no way for the user to use it.
Images are text selected on mouseup
Ability to drag images. In some browsers, they may have to be selected before dragging. As written in the previous item, a simple mouseup will result in an image being selected.
Images are selected using text selection and not "control selection" (that which provides the resize UI).
This is the best I could come up with after hours of very deep breaths. I think it is good enough if you really want to get rid of those handles.
In IE, Setting oncontrolselect to return false on the image, really does prevent those handles from appearing, and you can do it cleverly, by attaching the following handler to the mousedown event:
function (evt) {
var img;
function returnFalse() {
return false;
}
if (evt.tagName.toLowerCase() === "img") {
img = evt.target;
img.oncontrolselect = returnFalse;
}
}
It actually doesn't work completely well. The reason that it didn't work very well is that in order to begin a drag and drop operation on the image, one had to press and hold the mouse, without moving it, for a split second, and only then begin moving it for the drag. If one pressed the mouse and immediately began dragging, the image would remain in its place and not be dragged.
So I didn't do that.
What I did is the following. In all browsers, I used mouseup to text select the target image exclusively. In non-IE and IE11, synchronously:
function (evt) {
if (evt.target.tagName.toLowerCase() === "img") {
selectSingleNode(img); // In my case, I used Rangy
}
}
In IE 7 through 10, asynchronously:
function (evt) {
if (evt.target.tagName.toLowerCase() !== "img") {
return;
}
window.setTimeout(function () {
selectSingleNode(img); // In my case, I used Rangy
}, 0);
}
This made sure that after those handles show up, they disappear ASAP, because the image loses its "control selection" because that selection is replaced with a regular text selection.
In Internet Explorer 7 through 11, I attached a handler to dragend that removes all selection:
function (evt) {
if (evt.target.tagName.toLowerCase() === "img") {
deselect(); // I use Rangy for this, as well
}
}
This makes the handles that show up after drag and drop, disappear.
I hope this helps and I hope you can make it even better.
I just face that problem.
I tried document.execCommand("enableObjectResizing", false, false); but, the move icon was still appearing. What just fix my problem was just e.preventDefault() when onmousedown event occurs.
element.onmousedown = function(e){
e.preventDefault();
}
for IE11 (I havn't tested the older versions of IE, but I feel like it would work) you can add contenteditable="false" attribute to the img tag. This will prevent any re-sizing from being done while keeping drag and drop in place.
... just the best fix ever
<div contenteditable="true">
<label contenteditable="false"><input/></label>
</div>
or any html element that wraps your input/img
Works on IE11 like a charm
Have you tried adding the style
border: none;
to the div?